defmodule Bh do
  @moduledoc """
  Twitter Bootstrap 4 & Twitter Bootstrap 3 helpers for Phoenix.

  This package is designed to minimize repetitive code and the amount of HTML
  markup in your project's source code.

  **NOTE**: Please, keep in mind, that Twitter Bootstrap source files are not
  included into the package and should be installed separately.

  # Live examples

  Real live examples can be found on the site of the
  [Project](https://kovpack.github.io/bh/).

  # Installation:

  Add this package to the list of dependencies in your project's `mix.exs` file:

      def deps do
        [{:bh, "~> #{Bh.Mixfile.version}"}]
      end

  # Usage

  Use `use Bh` in your view file to import all **Bootstrap 4** (which is
  default) helpers at once:

      defmodule YourApp.SomeView do
        use YourApp.Web, :view
        use Bh
      end

  If you want to use **Bootstrap 3** helpers, you have to pass an extra option
  like this:

      defmodule YourApp.SomeView do
        use YourApp.Web, :view
        use Bh, bootstrap: 3
      end

  **NOTE:** keep in mind, that Bootstrap 3 and Bootstrap 4 helpers can have
  different APIs and may be not compatible, so check documentation or live
  examples.

  Now you can use all helpers directly calling `bh_label/1`, `bh_label/2` etc.

  If you need Bootstrap 4 or Bootstrap 3 standard label, instead of adding this
  HTML to your code (both versions of Bootstrap have the same markup for simple
  labels):

      <span class="label label-default">Default label</span>

  you can simply use helper for this:

      <%= bh_label "Default label" %>

  Or if you need contextual label pill for Bootstrap 4 only, you can use
  `bh_label_pill/2` function having specified also its context:

      <%= bh_label_pill "Danger pill label", context: :danger %>

  Which will result in such markup:

      <span class="label label-pill label-danger">Danger pill label</span>
  """

  defmacro __using__(opts \\ []) do
    if Keyword.has_key?(opts, :bootstrap) && opts[:bootstrap] == 3 do
      quote do
        import Bh.Bh3.Label
        import Bh.Bh3.Badge
        import Bh.Bh3.Icon
        import Bh.Bh3.Alert
      end
    else
      quote do
        import Bh.Bh4.Label
        import Bh.Bh4.Button
        import Bh.Bh4.Alert
        import Bh.Bh4.Modal
        import Bh.Bh4.Progress
      end
    end
  end
end